// 問題の URL を書いておく
// 

#include <bits/stdc++.h>

using namespace std;

//#define ENABLE_PRINT

#if defined(ENABLE_PRINT)

#define Print(v) \
do {\
    cerr << #v << ": " << v << endl; \
}while(0)

#define PrintVec(v) \
do {\
    for(int __i = 0; __i < v.size(); ++__i) \
    { \
        cerr << #v << "[" << __i << "]: " << v[__i] << endl; \
    }\
}while(0)

#define P(fmt, ...) fprintf(stderr, fmt, __VA_ARGS__)
#define LP fprintf(stderr, "L: %d\n", __LINE__)

#else

#define Print(v) ((void)0)
#define PrintVec(v) ((void)0)
#define P(fmt, ...) ((void)0)
#define LP ((void)0)

#endif

#define rep(i, n) for(int i = 0; i < (int)(n); ++i)

using ll = long long;

int main(int, const char**)
{
    string S;
    cin >> S;

    string Master = "kyoprotenkei90";
    sort(S.begin(), S.end());
    sort(Master.begin(), Master.end());

    cout << (S == Master ? "Yes" : "No") << endl;

    return 0;
}